Muzzle attachment for guns



April 24, 1,928.

I W.. R BLUEHDORN MUZZLE ATTACHMENT FOR GUNS Filed May 31. 1927 IIVI atent Apr. 24, 1928.

WILLIAM R, BLUEHDORN, F HARTFORD, CONNECTICUT.

MUZZLE ATTACHMENT roR GUNS.

Application filed May 3 1, 1927. Serial No. 195,507.

(GRANTEDUNDER THE PRQVISIONS OF THE ACT OF MARCH 3, 1883, 22 STAT. L., 625.)

The invention described herein may be used by the Government, or any of its officers or employees in prosecution .of work for the Government, or by any other person 5 in the United States, without payment to me reference to that class of attachments servof any royalty thereon, in accordance with the act of March 3, 1883.

This invention relates to a muzzle attachment for guns and more specifically it has ing to conceal flash, check recoil, muflie sound, and arrest the tendency of the gun to climb.

Devices of this character which comprise a cylindrical casing within which is a battle for imparting rotary motion to the gases, operate successfully on rifles firing single shot but when placed on machine guns having a high rate of fire they function indifferently unless they are made exceedingly large.

The principal object of this invention is to provide an attachment which will allow more effective expansion'of the gases due consideration being had to the relation between the rapidity of firing, the length of the dampening passage, the velocity of the gases and bullet, and the gyrations of the bullet when passing through the attachment. With the foregoing 1nd other objects in view, my invention resides in the novel arrangement and combination of parts and in the details ofconstruction hereinafter described and claimed, it being understood that changes in the'precise embodiment of the invention hereindisclosed may be made within the scope of what is claimed without departing from thespirit of the invention.

A practical embodiment of the invention is illustrated in the accompanying drawings, 'wherein:

Fig. 1 is a longitudinal sectional view of the attachment mounted onthe muzzle of a gun;

Fig. 2 is a view in front elevation;

Fig. 3 is a sectional view on the line 3-3 of Fig. 1; 1 I

F ig 4 and 5 are detail views of the splines. Ref rring to the drawings by numerals of reference: H

The attachment comprises a casing 5 interiorly threaded at the rear end 6 for securing it. to the 'muzzle of the gun. The

casing is of a truncated cone shape so that its cross sectional area will be increasing from rear to front and the inclination of the walls with respect to the axis of bore of the gun and the length of the casing will be determined by the relation between the Velocmay be retained in place by being threaded in a set of splines 8, in the casing. The baflle being of uniform depth throughout provides a flared axial passage which will allowthe bullet to pass through despite its gyrations.

The velocity of the gases is almost twice as great as the velocity of the bullet but because a large portion of the gases are restricted to a circuitous passage they will issue from the casing practically simultaneously with the bullet. As a result pressure will not be built up within the casing to interfere with the functioning of the device during subsequent shots.

Thebaffieis terminated forwardly in such a manner that the gases on being discharged will be directed against the lower portion of the casing the reaction being to overcome the tendency of the piece to climb.

Iclaim:

1. An attachment for guns embodying a truncated-cone shaped casing, means whereby the smaller end of the casing maybe secured to a gun, splines in the interior wall of the casing, and a helical bafile of'uniform height secured to the splines.

, 2. An attachment for guns embodying a truncated-cone shaped casing, means whereby the smaller end of the casing may be sofrom rear to front.'

WILLIAM R. BLUEHDORN.

having an axial bore gradually increasing 

